Chemical Ecology and Toxicology Lab

Chemical Ecology and Toxicology Lab 26 records found  previous11 - 20next  jump to record: Search took 0.00 seconds. 
11.
37 p, 724.7 KB Decrease in the diversity of pyrrolizidine alkaloids of Senecio pterophorus after invasion / Sánchez González, Alejandro ; Castells, Eva
Pyrrolizidine alkaloids (PAs) are N-based plant secondary metabolites that function as chemical defenses against vertebrate and invertebrate herbivores. PAs can be highly variable at intraspecific level, both in their absolute and relative concentrations. [...]
2014  
12.
3 p, 896.5 KB Són les plantes invasores més tòxiques que les natives? / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia)
Les plantes invasores poden modificar la composició, l'estructura i el funcionament dels ecosistemes que colonitzen i sembla que podrien canviar la seva pròpia composició química i toxicitat. Per tal d'esbrinar si es produeixen aquests darrers canvis, el grup d'Ecologia Química i Toxicologia de la UAB ha analitzat la concentració de certes molècules de l'arbust Senecio pterophorus que són tòxiques per a organismes invertebrats i vertebrats en plantes recol·lectades a la seva zona nativa i en tres regions on s'ha convertit en espècie invasora.
2015
UAB divulga, Maig 2015
3 documents
13.
1 p, 308.8 KB Z-ocimene, but not alkaloids, deters oviposition of the specialist moth Agonopterix alstroemeriana on Conium maculatum (Apiaceae) / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Berenbaum, May
Conium maculatum (Apiaceae), a Eurasian weed naturalized in North America, contains high concentrations of piperidine alkaloids, such as γ-coniceine, coniine and conhydrinone, that are toxic for livestock and humans and might also confer resistance against phytophagous insects. [...]
2007
Annual Meeting International Society of Chemical Ecology. Jena, Germany, 23è : 2007  
14.
1 p, 109.6 KB Genetic variation of alkaloid production in Conium maculatum after reassociation with the specialist moth Agonopterix alstroemeriana / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Berenbaum, May R.
Studies in biological control and invasion biology rarely determine whether introduced plants may rapidly evolve in the area of introduction. Examining the evolution of plant chemical defenses after reassociation with a coevolved enemy is important not only to understand the dynamics of plant-herbivore interactions but also in predicting potential ultimate outcomes of classical weed control programs. [...]
Total alkaloid production in C. maculatum was positively correlated with reassociation time between C. maculatum and A. alstroemeriana, with the longest historical association with A. alstroemeriana (NY) had highest alkaloid content; WA plants were intermediate, with the highest amount of variability among sites, and IL plants had lowest alkaloid concentrations. [...]

2006
Annual Meeting International Society of Chemical Ecology. Barcelona, Catalunya, 22è : 2006  
15.
71.9 KB Contemporary evolution of an invasive plant is associated with climate but not with herbivory. / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Colomer Ventura, Ferran (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals) ; Martínez Vilalta, Jordi, 1975- (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Zuccarini, Paolo (Institut de Recerca i Tecnologia Agroalimentàries (IRTA)) ; Escolà, Anna (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Armengot, Laura (Universitat de Barcelona. Departament de Biologia Vegetal)
Divergence in plant traits and trait plasticity after invasion has been proposed as mechanisms favouring invasion success. Current hypotheses predict a rapid evolution in response to changes in the abiotic conditions in the area of introduction or to differences in the herbivore consumption pressure caused by a decrease in the enemies associated with the area of origin [e. [...]
2015 - 10.1111/1365-2435.12463
Functional Ecology, Vol. 29, Issue 11, November 2015, p 1475–1485
3 documents
16.
36 p, 229.4 KB Diversity of pyrrolizidine alkaloids in native and invasive Senecio pterophorus (Asteraceae) : Implications for toxicity / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Mulder, Patrick P.J. ; Pérez Trujillo, Míriam (Universitat Autònoma de Barcelona. Servei de Ressonància Magnètica Nuclear)
Changes in plant chemical defenses after invasion could have consequences on the invaded ecosystems by modifying the interactions between plants and herbivores and facilitating invasion success. However, no comprehensive biogeographical studies have yet determined the phenotypic levels of plant chemical defenses, as consumed by local herbivores, covering large distributional areas of a species. [...]
2014 - 10.1016/j.phytochem.2014.09.006
Phytochemistry, Vol. 108 (Dec 2014) , p. 137-146
2 documents
17.
33 p, 314.5 KB Herbivores on native and exotic Senecio plants : is host switching related to plant novelty and insect diet breadth under field conditions? / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Morante, Maria (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Goula, Marta (Universitat Autònoma de Barcelona. Departament de Biologia Animal) ; Pérez, Nicolás ; Dantart, Jordi ; Escolà, Anna (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia)
1. Native herbivores can establish novel interactions with alien plants after invasion. Nevertheless, it is unclear whether these new associations are quantitatively significant compared to the assemblages with native flora under natural conditions. [...]
2014 - 10.1111/icad.12064
Insect Conservation and Diversity, 2014  
18.
34 p, 312.2 KB Reduced seed predation after invasion supports enemy release in a broad biogeographical survey / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Morante, Maria (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Blanco-Moreno, José M. (Universitat Autònoma de Barcelona. Departament de Biologia Vegetal) ; Sans, F. Xavier (Universitat Autònoma de Barcelona. Departament de Biologia Vegetal) ; Vilatersana, Roser (Institut Botànic de Barcelona) ; Blasco-Moreno, Annabel (Universitat Autònoma de Barcelona. Servei d'Estadística Aplicada)
The Enemy Release (ER) hypothesis predicts an increase in the plant invasive capacity after being released from their associated herbivores or pathogens in their area of origin. Despite the large number of studies on biological invasions addressing this hypothesis, tests evaluating changes in herbivory on native and introduced populations and their effects on plant reproductive potential at a biogeographical level are relatively rare. [...]
2013 - 10.1007/s00442-013-2718-4
Oecologia, Vol. 173, Num. 4 (Dec 2013) , p. 1397-1409  
19.
34 p, 168.9 KB Geographical variation in alkaloid production in Conium maculatum populations experiencing differential herbivory by Agonopterix alstroemeriana / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Berhow, M.A. ; Vaughn, S.F. ; Berenbaum, M.R.
Conium maculatum, a Eurasian weed naturalized in North America, contains high concentrations of piperidine alkaloids, which act as chemical defenses against herbivores. In the United States, C. maculatum was largely free from herbivory until approximately 30 years ago, when it was re-associated via accidental introduction with a monophagous European herbivore, the oecophorid caterpillar Agonopterix alstroemeriana. [...]
2005 - 10.1007/s10886-005-5921-x
Journal of chemical ecology, Vol. 31, Num. 8 (2005) , p. 1693-1709  
20.
9 p, 285.6 KB Laboratory rearing of Agonopterix alstroemeriana, the defoliating poison hemlock (Conium maculatum L.) moth, and effects of piperidine alkaloids on preference and performance. / Castells, Eva (Universitat Autònoma de Barcelona. Departament de Farmacologia, de Terapèutica i de Toxicologia) ; Berenbaum, May R.
Conium maculatum L. (Apiaceae), or poison hemlock, is an invasive plant native to Europe that has become extensively naturalized throughout North America. This species contains piperidine alkaloids, including coniine and -coniceine, that are highly toxic to vertebrates. [...]
2006 - 10.1603/0046-225X-35.3.607
Environmental entomology, Vol. 35, Num. 3 (2006) , p. 607-615  

Chemical Ecology and Toxicology Lab : 26 records found   previous11 - 20next  jump to record:
Interested in being notified about new results for this query?
Set up a personal email alert or subscribe to the RSS feed.